In the picture, Behati poses in a pair of underwear and rolled up top, while Adam shows off his tattooed torso in a pair of black pants.

The snap comes just weeks after Adam revealed he had been "eating a lot of stuff" during Behati's pregnancy so far.

"She's eating a lot of watermelon, a lot of watermelon," Adam said of his wife's cravings during an appearance on The Tonight Show Starring Jimmy Fallon last month (Apr16). "Because, you know, they get random cravings for stuff and it's just like, so much watermelon!"

However, Adam added that Behati hasn't just stuck to healthy snacks as she's a big fan of ice cream, and in a show of solidarity, he also began eating more food alongside his wife.

Adam confirmed he was going to be a father on Instagram in April (16) by sharing a picture of Behati sunbathing in a two-piece bikini, with a small bump on display.

He said being a parent had always been part of his plan and he cannot wait to meet the child, which is thought to be a little girl. He recently told ETOnline.com, "I'm ready to be a dad. You're born to be a parent, that's what we're here for, really. All the other s**t is great, but it's not what we're here for."